The extra check to see the voter count has increased was redundant; we
already check the request has finished inside the
`vote_for_poll_via_web` method and we check all three voters are created
in the results table.
Updating the poll so it's in the past after starting the browser might
result in database inconsistencies while running the tests, so we're
using `travel_to` instead.
JavaScript is used by about 98% of web users, so by testing without it
enabled, we're only testing that the application works for a very
reduced number of users.
We proceeded this way in the past because CONSUL started using Rails 4.2
and truncating the database between JavaScript tests with database
cleaner, which made these tests terribly slow.
When we upgraded to Rails 5.1 and introduced system tests, we started
using database transactions in JavaScript tests, making these tests much
faster. So now we can use JavaScript tests everywhere without critically
slowing down our test suite.
